You certainly have had this experience already: You are setting up a circuit and want to use it. However, it does not work as you expected! Now you have to troubleshoot the circuit. How? Find out here.

Techniques

You should familiarize yourself with some techniques.
They will help with the experiments...

A circuit diagram is one of the most important tools in electronics.
In a circuit diagram electrical circuits are shown
in a simplified graphical representation.
But how do you draw a diagram?
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You certainly have had this experience already:
You are setting up a circuit and want to use it.
However, it does not work as you expected!
Now you have to troubleshoot the circuit.
How? Find out here.
» more...